<template>
  <div>
      <!-- 面包屑导航区域 -->
        <el-breadcrumb  separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>角色管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table border stripe :data="rolesList">
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1 === 0? 'bdtop':'','vcenter']">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 !== item1.children.length - 1 ? 'bdbottom': '','vcenter']">
                                    <el-col :span="6">
                                        <el-tag closable type="success"
                                        @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag
                                            v-for="(item3) in item2.children"
                                            :key="item3.id"
                                            closable
                                            type="warning"
                                            @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                     <template slot-scope="scope">
                         <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                         <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                         <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                     </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限弹框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            @close="SetRightDialogVisibleClosed">
            <el-tree :data="rightsList" :props="treeProps"
                show-checkbox node-key="id"
                default-expand-all
                :default-checked-keys="defKeys"
                ref="treeRef"
            ></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 添加角色对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改角色 -->
        <el-dialog
            title="修改角色"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed">
             <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRole">确 定</el-button>
            </span>
        </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 控制分配权限显示与隐藏的对话框
      setRightDialogVisible: false,
      // 权限列表数据
      rightsList: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认显示的节点id数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 添加角色
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色字段规则
      addFormRules: {
        roleName: [{ required: true, trigger: 'blur', message: '请输入角色名' }],
        roleDesc: [{ required: true, trigger: 'blur', message: '请输入描述名称' }]
      },
      // 控制弹框显示与隐藏
      addDialogVisible: false,
      // 控制修改角色对话框显示与隐藏
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {},
      // 修改角色字段规则
      editFormRules: {
        roleName: [{ required: true, trigger: 'blur', message: '请输入角色名' }],
        roleDesc: [{ required: true, trigger: 'blur', message: '请输入描述名称' }]
      }
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) this.$message.error('获取角色列表失败')
      this.rolesList = res.data
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示角色是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消权限删除')

      const { data: res } = await this.$http.delete('roles/' + role.id + '/rights/' + rightId)

      if (res.meta.status !== 200) return this.$message.error('删除权限失败')

      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 获取到的权限数据保存到data中
      this.rightsList = res.data
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      console.log(this.defKeys)
      // 显示分配权限弹框
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有的三级权限的id, 并push到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node不包含children属性，则是三级节点
      if (!node.children) return arr.push(node.id)
      console.log(node.children)
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    SetRightDialogVisibleClosed() {
      // 清空defKeys数组，避免累积
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('更新权限失败')
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 关闭添加角色弹窗重置数据
    addDialogClosed() {
      this.addForm = {
        roleName: '',
        roleDesc: ''
      }
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定添加角色
    addRole() {
      // 添加之前进行表单校验
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加角色的网络请求
        const { data: res } = await this.$http.post('/roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        // 隐藏添加框
        this.addDialogVisible = false
        // 刷新角色列表
        this.getRolesList()
      })
      this.addDialogVisible = false
    },
    // 展示编辑角色对话框
    async showEditDialog(id) {
      this.editDialogVisible = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色失败')
      this.editForm = res.data
      console.log(this.editForm)
    },
    // 监听关闭修改角色事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮修改角色
    editRole() {
      console.log(this.editForm)
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        // 可以发起修改角色的网络请求
        const { data: res } = await this.$http.put('/roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败')
        }
        // 隐藏添加框
        this.editDialogVisible = false
        // 刷新角色列表
        this.getRolesList()
        this.$message.success('修改角色信息成功')
      })
    },
    // 根据id删除相应的角色
    async removeRoleById(id) {
      // 弹框询问角色是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      console.log((confirmResult))
      // 如果角色确认删除，则返回字符串 confirm
      // 如果角色取消删除，则返回字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('该角色删除失败')
      }
      this.$message.success('该角色已经删除')
      this.getRolesList()
    }
  }
}
</script>

<style>
    .el-tag {
        margin: 7px;
    }
    .bdtop {
        border-top: 1px solid #eee;
    }
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>
